26 ADIANTUM. 



be considered a synonym of A. intermedium, or ihat it should rank next it, 

 I do not know. 



50. A.glaucescens, Kl. ; frond bipinnate, ])innsD about 5 — 9 

 1 ateral ones horizontal terminal one elongated, pinnules subpe- 

 tiolate membranaceous oblong-dimidiate obtuse very glau- 

 cous beneath lower margin straight for its whole length upper 

 base truncate and parallel with the rachis upper margin 

 when sterile scarcely lobed or serrated fertile one slightly 

 lobed, sori on the lobes of the upper margin distinct but 

 approximate, stipes and rachis slender black ebeneous very 

 glossy and glabrous, rhizoma very short thick, fibres tufted. — 

 Klotzsch in LimKea, 1844, p. 552, and in Herb. J. Sm. — ft. 

 larger, less glaucous, rachis with very sparse minute chaffy 

 hairs. 



Hab. British Guiana, Rich. Schomburgk {Klotzsch) and Sir Rob. II. 

 Schomhurgk {in Herb, nostr.). French Guiana, {Delessert in Herb, noslr.) 

 Xear Para, Brazil, Spruce, n. 46, and /3. No. 48, "Tanaii ad Rio Acara, 

 juxtaPara.'' — The delicate membranaceous frond and slender, pjraceful, 

 very glossy and glabrous stipes and rachis of this fern, with its obtuse and 

 differently shaped pinnules, seem to distinguish it from A. intermedium ; 

 and our Guiana specimens from two localities exactly correspond with 

 Dr. Klotzsch's plant in Herb. J. Smith. Our No. 46, too, of Mr. Spruce 

 from the Amazon, is equally identical, and the short thick rhizoma, 

 tufted fibrous root (no creeping caudex), unknown to Dr. Klotzsch, would 

 seem to confirm the specific identity. Our n. 48, from Mr. Spruce, 

 however, from Tanaii (another 48 of the same able botanist is A. interme- 

 dium), has a stouter stipes, larger frond and a few scattered hairs on the 

 rachis, but otherwise agrees with ylaucescens : its root was not seen. 



51. A. trinngulatum, Kaulf ; frond bipinnate, pinnae 5 — 9 

 terminal one elongated, pinnules subpetiolafe chartaceous 

 dark green on both sides rather glossy ovato-oblong subfal- 

 cate (curved upwards) obtusely acuminate obliquely cuneate 

 at the base, upper base truncate and parallel with the rachis, 

 sterile serrulate scarcely lobed, sori oblong nearly equal sub- 

 lunate approximate, stipes triangular and rachis rather woolly 

 with ferruginous hairs deciduous on the latter. — Kaulf. En. 

 Fil. p. 204. Klotzsch in Linnaa, xviii. p. 552 {e.vcl. syn. 

 A. fovearum, Raddi ?) A. villosum, Kze. Fit. e.vsicc. Poepp. 

 [an Kze. in LimKBa, ix. p. 79.?) — /3. ? pinnules much larger 

 and more elongated. 



Hab. Brazil {Kaulfus.i). Salango, Columbia, Hinds. British Guiana, 

 Rich. Schomburgk {Klotzsch, in Herb. J. Smith, n. 252.) Jamaica, Wil- 

 xon, Mc Nab. Guadeloupe, L'Herminicr. Cuba, Otto {Klotzsch, in Herb, 

 nostr. n. 243.) Maynas, Peru, {Poeppig). Esmeraldas, Seemann. — 0. Trini- 

 dad, Aldridge. — I am aware that Presl and Kunze consider the triungula- 

 tum of Kaulfuss to be identical with A. intermedium, Sw., and /orearMTw of 

 Raddi ; and though Dr. Klotzsch retains it as a species (distinct from inter- 



